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Astrophotography and Sketching >> DSLR & Digital Camera Astro Imaging & Processing

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Toxic Coolaid
professor emeritus


Reged: 10/01/11

Loc: NorthEast Tennessee
2nd attempt at the Rosette Nebula new
      #5559513 - 12/07/12 03:47 PM

C49 shot from my driveway. My light pollution limited me to 120 seconds with the CLS filter. I had to estimate the framing because I couldn't see the nebula, and it pretty much fills the frame.

seeing 8/10 for a yellow/red zone
Sky-Watcher 80mm ED
60Da with Astronomik's clip in CLS Filter
CGEM guided with SSAG package
Stacked in DSS and processed with PS
with Troy's actions, Gradient X Terminator, Noiseware Professional

60 x 120 sec Lights
15 Darks
30 each of Flats, Dark Flats, Offset




Here is what each light frame looks like



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zjc26138
Loved By All
*****

Reged: 02/24/05

Loc: Mingo Junction, Ohio
Re: 2nd attempt at the Rosette Nebula new [Re: Toxic Coolaid]
      #5559657 - 12/07/12 05:38 PM

Beautiful image!

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David PavlichAdministrator
Transmographied
*****

Reged: 05/18/05

Loc: Mandeville, LA USA
Re: 2nd attempt at the Rosette Nebula new [Re: Toxic Coolaid]
      #5559737 - 12/07/12 06:17 PM

Nice work on one of my favorites!

David


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WhitenerJ
professor emeritus


Reged: 02/06/12

Loc: Waxahachie, Texas
Re: 2nd attempt at the Rosette Nebula new [Re: David Pavlich]
      #5559816 - 12/07/12 06:55 PM

Nice job!!! Really great that you got such a nice result.

I noticed your CLS filter does the same thing to your subs as my IDAS does. How do you go about figuring out the right exposure with multiple color spikes?

Jason


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Toxic Coolaid
professor emeritus


Reged: 10/01/11

Loc: NorthEast Tennessee
Re: 2nd attempt at the Rosette Nebula new [Re: WhitenerJ]
      #5559894 - 12/07/12 08:04 PM

Quote:

How do you go about figuring out the right exposure with multiple color spikes?





When I'm shooting at home I know 120 seconds will be near my max. I'll usually soot test shots at 3200 ISO, and I image at 800 ISO. So, 30 sec @ 3200 = 120 sec @ 800. I'll look at the histogram and try to keep the blue at about 1/3. You can see the histogram from the single sub on the bottom right of the AstroBin link. I can pretty much tell when I'm getting over run by LP just from looking at the camera image . Sometimes I can only get 60 seconds. If I have time to drive out to the dark, I'm good for 600 sec+

I really wasn't sure what I would get on the Rosette because the subs looked so bad, but I thought I'd give it a try. At the very least I'd get a star field to look at.

Edited by Toxic Coolaid (12/07/12 08:16 PM)


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Nils_Lars
Postmaster
*****

Reged: 01/04/08

Loc: Santa Cruz Mountains , CA
Re: 2nd attempt at the Rosette Nebula new [Re: Toxic Coolaid]
      #5560130 - 12/07/12 11:08 PM

Some awesome details coming through , great work

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mmalik
Post Laureate
*****

Reged: 01/13/12

Loc: USA
Re: 2nd attempt at the Rosette Nebula new [Re: Toxic Coolaid]
      #5560172 - 12/07/12 11:38 PM

Well done; you could brighten it up a bit. Thx

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Toxic Coolaid
professor emeritus


Reged: 10/01/11

Loc: NorthEast Tennessee
Re: 2nd attempt at the Rosette Nebula new [Re: mmalik]
      #5560221 - 12/08/12 12:19 AM

brightened a bit. It's bringing the noise out quite a bit now though.



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jambroseus
professor emeritus


Reged: 04/05/07

Loc: Mount Laurel, New Jersey
Re: 2nd attempt at the Rosette Nebula new [Re: Toxic Coolaid]
      #5560496 - 12/08/12 08:08 AM

Great work for a light polluted site!!

John


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Maverick199
Postmaster
*****

Reged: 02/27/11

Loc: India
Re: 2nd attempt at the Rosette Nebula new [Re: Toxic Coolaid]
      #5560560 - 12/08/12 09:25 AM

Wow, thanks for posting the light frame, helps understand what to expect.

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Barry E.
super member


Reged: 12/27/08

Re: 2nd attempt at the Rosette Nebula new [Re: Maverick199]
      #5560600 - 12/08/12 10:01 AM

You really pulled a lot out of those light-polluted frames! And only 120s each makes it more impressive.

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mmalik
Post Laureate
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Reged: 01/13/12

Loc: USA
Re: 2nd attempt at the Rosette Nebula new [Re: Toxic Coolaid]
      #5561174 - 12/08/12 04:41 PM

Quote:

It's bringing the noise out quite a bit now though.




You could try posting FIT if you would like folks to try. Plain brightening will introduce noise; there are other ways; DD, curves, etc. as you may know. Thx


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bouffetout
scholastic sledgehammer


Reged: 11/21/12

Loc: Canada
Re: 2nd attempt at the Rosette Nebula new [Re: mmalik]
      #5561379 - 12/08/12 07:24 PM

Beautiful photo ! congrats !

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Toxic Coolaid
professor emeritus


Reged: 10/01/11

Loc: NorthEast Tennessee
Re: 2nd attempt at the Rosette Nebula [Re: mmalik]
      #5561387 - 12/08/12 07:28 PM

I really need better conditions and better signal. What is the best way to post a DSS file? I use TIFFs, but either way. I'd be happy to see what can be done with it. I was very happy and surprised to pull as much out of the LP as I could. I hope to get a few nights in a dark location and give it another try.

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mmalik
Post Laureate
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Reged: 01/13/12

Loc: USA
Re: 2nd attempt at the Rosette Nebula new [Re: Toxic Coolaid]
      #5561970 - 12/09/12 08:09 AM

Quote:

What is the best way to post a DSS file? I use TIFFs, but either way.




You could use this... if you have Hotmail/msn account to post your TIF/FIT. Thx


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Skyshooter
professor emeritus


Reged: 04/07/08

Loc: S. Utah, U.S.A.
Re: 2nd attempt at the Rosette Nebula new [Re: mmalik]
      #5562332 - 12/09/12 12:12 PM

Nice catch on the Rosette. It's amazing what can be done even from a yellow zone! Your framing problems plague everyone. I always have to take a couple test shots to nail the framing. Seldom do I see the object in the camera. I like the lighter one better of the two. Nice detail, good focus and composition. Gotta Love that!

Cheers,
Ed


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Toxic Coolaid
professor emeritus


Reged: 10/01/11

Loc: NorthEast Tennessee
Re: 2nd attempt at the Rosette Nebula new [Re: Skyshooter]
      #5562458 - 12/09/12 01:27 PM

Luckily the Rosette has the bright stars at it's core marking it's center. Of course that's why it's there. Most targets get cropped and don't need the perfect framing. I always use the good old Bahtinov mask. I had just cleaned and adjusted the Crayford focuser on the Sky-Watcher, and it made a huge improvement on fine focusing and focus lock. It's almost amazing those things even work, but they do.

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